Life Style Business Fashion Gifts IntelligenceHard carbon Fancy Coloured DiamondsNeha SinghNovember 9, 2020November 10, 2020 by Neha SinghNovember 9, 2020November 10, 20200408 Diamonds were created billions of years ago, about 100 miles below the earth’s surface in the upper mantle, by immense heat and pressure. Top investment-grade...